Appeal No. 95-4530
Application 08/077,993
14-16 and 19-22, all the claims pending in the application.
The invention pertains to a method and apparatus for
determining the electrical wiring state of electric wiring.
Claims 1, 11 and 21 are illustrative and read as follows:
1. A method of determining an electric wiring state,
comprising the steps of:
feeding at least one pulse voltage signal into one of
two lines short-circuited at their two source portions;
detecting the pulse voltage signal at two end portions
corresponding to the two source portions; and
discriminating wiring state between the two source
portions and the corresponding two end portions upon a comparison
of polarities between the fed pulse voltage signal and the
detected signal.
11. An apparatus for determining an electrical wiring
state, comprising:
an oscillation device for feeding at least one pulse voltage
signal into one of two lines short-circuited at their two source
portions;
a discrimination device for detecting the signal at two end
portions corresponding to the two source portions and
discriminating polarities of the fed pulse voltage signal and the
detected signal;
wherein said discrimination device includes
a polarity distinction circuit adapted to sense a plus
element and minus element of the fed pulse voltage signal
from the two end portions to thereby distinguish a straight
polarity when the order of the elements are the same to that
from said oscillation device and a reversed polarity when
2
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